Update community/UTAU.gitignore

Co-authored-by: Devin Dooley <dooleydevin@github.com>

Author: oxygen-dioxide

community/UTAU.gitignore

@@ -13,7 +13,6 @@
 *.llsm
 *.mrq
 *.pitchtier
-*.pkf
 *.platinum
 *.pmk
 *.sc.npz